what happened to kevin collins? tonight investigators say this man may have taken the secret to his grave. he's been a suspect from the start. >> reporter: at the time he was known as wayne jackson. but the man in the spotlight now went by many names before dying of natural causes in the sunset here in san francisco in 2008. >> this case is a case that haunts the san francisco police department and the city of san francisco and has pretty much throughout the entire careers of everybody that's standing here. >> reporter: a fresh look at the crime led to the search of jackson's old home where jackson and his roommate lived just blocks away from where kevin collins disappeared in 1984. jackson was a suspect from the start because thee years earlier, he spent six months in jail for lewd acts on a 7-year-old. >> he had a dog similar to the dog that the suspects were seen to have. >> reporter: still at the time, police came up short. >> he was detained, interviewed, allowed a search of the same house we just did the searc